CN113531097B - Gearbox housing, derailleur and vehicle - Google Patents

Abstract

The invention relates to the technical field of transmissions, and provides a gearbox shell, a transmission and a vehicle, wherein the gearbox shell comprises a body, a first bearing hole, a second bearing hole and a third bearing hole; the first bearing hole is used for mounting a differential output shaft; the second bearing hole is used for mounting an input shaft of the driving motor, the second bearing hole and the first bearing hole are arranged at intervals, and the second bearing hole is arranged at one end, far away from the oil level S, of the first bearing hole; the third bearing hole is used for mounting the output shaft of the driving motor and is arranged between the first bearing hole and the second bearing hole; wherein, seted up first oil circuit on the body, first oil circuit flows through first bearing hole, second bearing hole and third bearing hole, and first oil circuit configuration is configured to can lead the fluid that the ring gear drove to second bearing hole and third bearing hole respectively. The transmission case can guide lubricating oil and reduce parts of a lubricating structure as much as possible, so that the cost of the transmission and the vehicle is reduced.

Description

Gearbox housing, derailleur and vehicle

Technical Field

The invention relates to the technical field of transmissions, in particular to a gearbox shell, a transmission and a vehicle.

Background

At present, the existing vehicle gearbox usually adopts a forced lubrication structure, the forced lubrication structure uses an oil pump to pump lubricating oil in a box body to an oil pipe through an added oil passage, and the lubricating oil is led to positions needing lubrication, such as a bearing hole, a gear and the like through the oil pipe and a nozzle. However, the forced lubrication structure has problems of many parts, high cost, and large space occupation of the transmission, and is not favorable for controlling the cost and the mounting space of the whole vehicle.

Disclosure of Invention

In view of the above, the present invention is directed to a transmission case that can guide lubricating oil while reducing the number of parts of a lubricating structure as much as possible, thereby reducing the cost of the transmission and the vehicle.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a gearbox housing comprising a body, a first bearing bore, a second bearing bore, and a third bearing bore, the first bearing bore, the second bearing bore, and the third bearing bore all disposed on the body; the first bearing hole is used for mounting a differential output shaft and enabling a part of a gear ring mounted on the differential output shaft to be always positioned below an oil level S; the second bearing hole is used for installing a driving motor input shaft, the second bearing hole and the first bearing hole are arranged at intervals, and the second bearing hole is arranged at one end, far away from the oil liquid level S, of the first bearing hole; the third bearing hole is used for mounting an output shaft of a driving motor and is arranged between the first bearing hole and the second bearing hole; the body is provided with a first oil path, the first oil path flows through the first bearing hole, the second bearing hole and the third bearing hole, and the first oil path is configured to be capable of guiding oil driven by the gear ring to the second bearing hole and the third bearing hole respectively.

Optionally, the first oil path includes a first branch, the first branch passes through a space between the first bearing hole and the third bearing hole, and the first branch is configured to be able to guide the oil to the first bearing hole and the third bearing hole, respectively.

Optionally, the first branch includes a first oil blocking rib, the first oil blocking rib is disposed at the third bearing hole, and the first oil blocking rib is configured to block a part of the oil and guide the part to flow to the third bearing hole.

Optionally, the first branch passes through a space between the first bearing hole and the third bearing hole and extends to the second bearing hole, and the first branch is configured to be capable of guiding the oil to the second bearing hole under the driving of the gear ring and the output shaft of the driving motor.

Optionally, the first branch includes a second oil blocking rib, the second oil blocking rib is disposed at the second bearing hole, and the second oil blocking rib is configured to be capable of blocking the oil and guiding the oil to flow to the second bearing hole.

Optionally, the first oil path includes a second branch, the second branch passes between the third bearing hole and the edge of the body and extends to the second bearing hole, and the second branch is configured to be able to guide the oil to the second bearing hole and the third bearing hole, respectively.

Optionally, the transmission housing includes a fourth bearing hole and a fifth bearing hole, and the fourth bearing hole and the fifth bearing hole are both disposed on the body; the fourth bearing hole is used for mounting the generator shaft and enabling a part of a gear mounted on the generator shaft to be positioned below the oil level S; the fifth bearing hole is used for mounting an engine input shaft, the fifth bearing hole and the fourth bearing hole are arranged at intervals, and the fifth bearing hole is arranged at one end, far away from the oil liquid level S, of the fourth bearing hole; the body is provided with a second oil path, the second oil path flows through the fourth bearing hole and the fifth bearing hole, and the second oil path is configured to guide oil driven by the gear to the fifth bearing hole.

Optionally, the second oil path includes a third branch and a fourth branch, the third branch passes through between the fourth bearing hole and the edge of the body and extends to the fifth bearing hole, and the third branch is configured to guide the oil to the fifth bearing hole; the fourth branch is arranged between the first bearing hole and the fourth bearing hole and extends to the fifth bearing hole, and the fourth branch is configured to enable oil liquid driven by the gear ring to be respectively guided to the fourth bearing hole and the fifth bearing hole.

Compared with the prior art, the gearbox shell has the following advantages:

the first bearing hole is arranged at a position such that a part of a gear ring mounted on a differential output shaft in the first bearing hole is always located below an oil level S, when the gear ring rotates, the gear ring lifts oil and causes the oil to enter the first oil passage, and the oil flows down to the second bearing hole and the third bearing hole under the guidance of the first oil passage, thereby lubricating the second bearing hole and the third bearing hole. According to the transmission case, the first oil way is formed in the body, and the arrangement positions of the first bearing hole, the second bearing hole and the third bearing hole on the body are matched with each other, so that the functions of guiding and lubricating oil are achieved.

The invention further provides a transmission which comprises the transmission case.

The invention also provides a vehicle comprising the transmission.

Compared with the prior art, the transmission, the vehicle and the gearbox housing have the same advantages, and the detailed description is omitted.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of one embodiment of a transmission housing of the present invention;

FIG. 2 is a schematic illustration of the oil flow direction of the transmission of the present invention in a first operating condition;

FIG. 3 is a schematic representation of the oil flow direction for a transmission of the present invention in a second operating condition;

FIG. 4 is a schematic representation of the oil flow direction during a third operating condition of the transmission of the present invention.

Description of reference numerals:

10-first bearing hole, 20-second bearing hole, 30-third bearing hole, 40-fourth bearing hole, 50-fifth bearing hole, 60-body, 61-first branch, 62-second branch, 63-third branch, 64-fourth branch, 611-first oil baffle rib, 612-second oil baffle rib

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In addition, directional terms such as "clockwise, counterclockwise, up, down, left, right" and the like in the embodiments of the present invention refer to directions in the drawings.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the transmission case of the present invention includes abody 60, a first bearinghole 10, a second bearinghole 20, and a third bearinghole 30, wherein the first bearinghole 10, the second bearinghole 20, and the third bearinghole 30 are all disposed on thebody 60; the first bearinghole 10 is used for mounting a differential output shaft and enabling a part of a gear ring mounted on the differential output shaft to be always positioned below the oil level S; the second bearinghole 20 is used for mounting a driving motor input shaft, the second bearinghole 20 is arranged at a distance from the first bearinghole 10, and the second bearinghole 20 is arranged at one end of the first bearinghole 10 far away from the oil level S; the third bearinghole 30 is used for mounting a driving motor output shaft and is arranged between the first bearinghole 10 and the second bearinghole 20; thebody 60 is provided with a first oil path, the first oil path flows through the first bearinghole 10, the second bearinghole 20 and the third bearinghole 30, and the first oil path is configured to guide oil driven by the gear ring to the second bearinghole 20 and the third bearinghole 30 respectively.

In the present invention, the first bearinghole 10 is disposed at a position such that a portion of the ring gear mounted on the differential output shaft in the first bearinghole 10 is always located below the oil level S, and when the ring gear rotates, the ring gear lifts oil and causes the oil to enter the first oil passage, and the oil flows down to the second bearinghole 20 and the third bearinghole 30 under the guidance of the first oil passage, thereby lubricating the second bearinghole 20 and the third bearinghole 30. According to the transmission case, the first oil way is formed in thebody 60, and the arrangement positions of the first bearinghole 10, the second bearinghole 20 and the third bearinghole 30 on thebody 60 are matched with each other, so that the functions of guiding and lubricating oil are achieved.

In an embodiment of the present invention, the first oil path may not only guide the oil to the second bearinghole 20 and the third bearinghole 30 for lubrication, but also assist in lubricating the first bearinghole 10. Specifically, the first oil passage includes afirst branch passage 61, thefirst branch passage 61 passes through a space between thefirst bearing hole 10 and the third bearinghole 30, and thefirst branch passage 61 is configured to guide the oil to the first bearinghole 10 and the third bearinghole 30, respectively. In other words, a part of the oil entrained by the ring gear flows to the first bearinghole 10 and the third bearinghole 30 through thefirst branch passage 61, thereby lubricating the first bearinghole 10.

It should be appreciated that the first oil passage may direct oil to the bearing bore in a variety of ways. For example, as shown in fig. 1, thefirst branch 61 has a downwardly curved arc structure, a communication groove communicating with the first bearinghole 10 is opened in a side wall of the arc structure, and when the ring gear rotates counterclockwise, the oil is lifted by the ring gear to enter thefirst branch 61 from a right end of thefirst branch 61, then flows downward to the communication groove, and flows to thefirst bearing hole 10 through the communication groove for lubrication.

It should be appreciated that thefirst branch path 61 may direct the oil to the third bearinghole 30 in various ways, and in an embodiment of the present invention, thefirst branch path 61 includes a firstoil blocking rib 611, the firstoil blocking rib 611 is disposed at the third bearinghole 30, and the firstoil blocking rib 611 is configured to block a portion of the oil and direct the portion of the oil to the third bearinghole 30. That is, the firstoil blocking rib 611 is disposed on a path along which oil flows, and blocks a portion of the oil and changes a flow direction of the portion of the oil, so that the portion of the oil flows to the third bearinghole 30.

In the above embodiment, by changing the height of the firstoil blocking rib 611, the flow rate of the oil that can be blocked by the firstoil blocking rib 611 and the flow rate of the oil that can pass the firstoil blocking rib 611 can be adjusted: of the oil flowing through thefirst branch 61, a part of the oil is blocked by the firstoil blocking rib 611 and changes its direction to flow to the third bearinghole 30 for lubrication, and another part of the oil passes through the firstoil blocking rib 611 and finally flows to the second bearinghole 20 for lubrication.

It should be appreciated that thefirst branch path 61 may direct the oil passing through the firstoil blocking rib 611 to the second bearinghole 20 in various manners, for example, in an embodiment of the present invention, thefirst branch path 61 includes a secondoil blocking rib 612, the secondoil blocking rib 612 is disposed at the second bearinghole 20, and the secondoil blocking rib 612 is configured to block the oil and direct the oil to thesecond bearing hole 20. That is, the secondoil blocking rib 612 is disposed on a path along which the oil flows, and is capable of blocking all the oil flowing thereto and changing a flow direction of the oil so that the oil flows to the second bearinghole 20 for lubrication.

Since thefirst branch path 61 passes through thefirst bearing hole 10 and the third bearinghole 30, the oil flowing through thefirst branch path 61 can be driven not only by the ring gear on the differential output shaft to flow but also by the gear mounted on the drive motor output shaft of the third bearing hole 30 (the rotation direction of the ring gear on the differential output shaft is opposite to the rotation direction of the gear on the drive motor output shaft), thereby obtaining more kinetic energy, so that the oil can flow to thesecond bearing hole 20 more rapidly and efficiently, and since the oil has more kinetic energy, the oil can flow to the second bearinghole 20 for lubrication even if the second bearinghole 20 is disposed far from the third bearinghole 30.

In an embodiment of the present invention, the first oil path further includes asecond branch 62, thesecond branch 62 passes between the third bearinghole 30 and the edge of thebody 60 and extends to thesecond bearing hole 20, and thesecond branch 62 is configured to guide the oil to the second bearinghole 20 and the third bearinghole 30, respectively. Through setting upsecond branch road 62, can make the fluid reposition of redundant personnel in the first oil circuit, when the flow of the fluid in the first oil circuit is too much, timely reposition of redundant personnel can be alleviated the pressure offirst branch road 61, simultaneously, becausesecond branch road 62 withfirst branch road 61 sets up respectively second bearinghole 20 reaches the relative both ends of third bearinghole 30, consequently can be in second bearinghole 20 and the not equidirectional introduction fluid of third bearinghole 30 is lubricated, improves lubricated effect and lubricated quality.

In addition, it should be noted that thesecond branch 62 may also guide the oil to the second bearinghole 20 and the third bearinghole 30 in various ways, for example, thesecond branch 62 may include a third oil guiding rib disposed at thesecond bearing hole 20 and a fourth oil guiding rib disposed at the third bearinghole 30.

In order to enable the gearbox to work under multiple working conditions, in one embodiment of the invention, the gearbox housing comprises a fourth bearinghole 40 and a fifth bearinghole 50, and the fourth bearinghole 40 and the fifth bearinghole 50 are both arranged on thebody 60; the fourth bearinghole 40 is used for mounting a generator shaft and enabling a part of a gear mounted on the generator shaft to be located below an oil level S; the fifth bearinghole 50 is used for mounting an engine input shaft, the fifth bearinghole 50 is arranged at a distance from the fourth bearinghole 40, and the fifth bearinghole 50 is arranged at one end of the fourth bearinghole 40 far away from the oil level S; a second oil path is formed in thebody 60, and the second oil path flows through the fourth bearinghole 40 and the fifth bearinghole 50, and is configured to guide oil driven by the gear to the fifth bearinghole 50. In this embodiment, thefourth bearing hole 40 is positioned such that a portion of the gear on the generator shaft mounted in thefourth bearing hole 40 is below the oil level S, and when the gear on the generator shaft rotates, oil is lifted and enters the second oil passage, which is guided by the second oil passage to flow down to the fifth bearinghole 50, thereby lubricating the fifth bearinghole 50. Compared with the prior art, the gearbox shell has the advantages that the second oil way is formed in thebody 60, the arrangement positions of the fourth bearinghole 40 and the fifth bearinghole 50 on thebody 60 are matched with each other, so that the functions of guiding and lubricating oil are realized, forced lubricating structures such as oil pipes and spray heads are omitted, parts of a gearbox are reduced, and the cost of the gearbox and a vehicle is reduced.

In one working condition, the differential output shaft and the generator shaft rotate simultaneously, the gear ring on the differential output shaft and the gear on the generator shaft both raise oil, so that the oil level S drops faster, and the gear on the generator shaft is far smaller than the gear ring on the differential output shaft, when the oil level S drops more, the gear on the generator shaft cannot contact the oil level S any more, so that oil cannot be provided to the second oil path, and the fifth bearinghole 50 may not be lubricated. To solve this problem, in an embodiment of the present invention, the second oil path further includes athird branch 63 and afourth branch 64, thethird branch 63 passes between thefourth bearing hole 40 and the rim of thebody 60 and extends to the fifth bearinghole 50, and thethird branch 63 is configured to guide the oil to the fifth bearinghole 50; thefourth branch 64 is disposed between the first bearinghole 10 and the fourth bearinghole 40 and extends to the fifth bearinghole 50, and thefourth branch 64 is configured to guide oil liquid driven by the gear ring to the fourth bearinghole 40 and the fifth bearinghole 50, respectively. That is, when the oil level S is high, the gear on the generator shaft can lift the oil and make the oil flow to the fifth bearinghole 50 through thethird branch 63, and when the oil level S is low, the gear on the generator shaft cannot contact the oil, so that the oil can be lifted through the gear ring on the output shaft of the differential and made to flow to the fourth bearinghole 40 and the fifth bearinghole 50 through thefourth branch 64 for lubrication.

The invention also provides a transmission which comprises the transmission case. The transmission has the same advantages as the transmission housing described above over the prior art and will not be described in detail here.

The operation of the transmission case of the present invention will be explained with reference to fig. 2 to 4 by taking a hybrid-dedicated transmission as an example.

In fig. 2-4, the differential output shaft is mounted in the differential bearing bore (i.e., first bearing bore 10), the drive motor input shaft is mounted in the drive motor input bearing bore (i.e., second bearing bore 20), the drive motor output shaft is mounted in the drive motor output bearing bore (i.e., third bearing bore 30), the generator shaft is mounted in the generator bearing bore (i.e., fourth bearing bore 40), and the engine input shaft is mounted in the engine input bearing bore (i.e., fifth bearing bore 50).

As shown in fig. 2, in the EV operating mode (i.e., the first operating mode), the gear ring on the differential output shaft rotates counterclockwise, the gear on the drive motor output shaft rotates clockwise, the lower portion of the gear ring on the differential output shaft is always located below the oil level S, the oil is lifted by the gear ring on the differential output shaft and enters the first oil passage, and the flow direction of the oil is shown by an arrow in the drawing. Wherein, fluid flows to differential mechanism dead eye, driving motor output dead eye and driving motor input dead eye respectively and lubricates through the ring gear on the differential mechanism output shaft and the drive of the gear on the driving motor output shaft infirst branch road 61. The oil is driven by the gear ring on the differential output shaft in thesecond branch 62, and flows to the output bearing hole of the driving motor and the input bearing hole of the driving motor respectively for lubrication.

As shown in fig. 3, in the power generation operation (i.e., the second operation), the gear on the generator shaft rotates clockwise, and the lower portion of the gear on the generator shaft is located below the oil level S, and the oil level S is not substantially lowered because the gear on the generator shaft is small. The oil is lifted by the gear on the generator shaft and enters the second oil path, and the flowing direction of the oil is shown by an arrow in the figure. Wherein the oil is driven by the gear on the generator shaft in thethird branch 63 and flows to the input bearing hole of the engine for lubrication.

As shown in fig. 4, in the series connection condition (i.e., the third condition), the gear ring on the output shaft of the differential rotates counterclockwise, the gear on the output shaft of the driving motor rotates clockwise, the gear on the generator shaft rotates clockwise, the oil level S drops, so the gear on the generator shaft can not contact oil any more, the oil rises through the gear ring on the output shaft of the differential and enters the first oil passage and the second oil passage respectively, and the flow direction of the oil is shown by arrows in the figure. Wherein, fluid flows to differential mechanism dead eye, driving motor output dead eye and driving motor input dead eye respectively and lubricates through the ring gear on the differential mechanism output shaft and the drive of the gear on the driving motor output shaft infirst branch road 61. The oil is driven by the gear ring on the differential output shaft in thesecond branch 62, and flows to the output bearing hole of the driving motor and the input bearing hole of the driving motor respectively for lubrication. The oil is driven by the ring gear on the differential output shaft in thefourth branch 64, and flows to the generator bearing hole and the engine input bearing hole respectively for lubrication.

The invention also provides a vehicle comprising the transmission. The vehicle has the same advantages as the gearbox housing and the transmission described above over the prior art, and will not be described further herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A transmission housing, characterized in that it comprises a body (60), a first bearing hole (10), a second bearing hole (20) and a third bearing hole (30), said first bearing hole (10), said second bearing hole (20) and said third bearing hole (30) being provided on said body (60);

the first bearing hole (10) is used for mounting a differential output shaft and enabling a part of a gear ring mounted on the differential output shaft to be always positioned below an oil level S;

the second bearing hole (20) is used for mounting a driving motor input shaft, the second bearing hole (20) and the first bearing hole (10) are arranged at intervals, and the second bearing hole (20) is arranged at one end, away from the oil level S, of the first bearing hole (10);

the third bearing hole (30) is used for mounting a driving motor output shaft and is arranged between the first bearing hole (10) and the second bearing hole (20);

a first oil path is formed in the body (60), the first oil path flows through the first bearing hole (10), the second bearing hole (20) and the third bearing hole (30), and the first oil path is configured to guide oil driven by the gear ring to the second bearing hole (20) and the third bearing hole (30) respectively;

the gearbox shell comprises a fourth bearing hole (40) and a fifth bearing hole (50), and the fourth bearing hole (40) and the fifth bearing hole (50) are both arranged on the body (60); the fourth bearing hole (40) is used for mounting a generator shaft and enabling a part of a gear mounted on the generator shaft to be positioned below an oil level S; the fifth bearing hole (50) is used for mounting an engine input shaft, the fifth bearing hole (50) and the fourth bearing hole (40) are arranged at intervals, and the fifth bearing hole (50) is arranged at one end, away from the oil liquid level S, of the fourth bearing hole (40); the body (60) is provided with a second oil path, the second oil path flows through the fourth bearing hole (40) and the fifth bearing hole (50), and the second oil path is configured to guide oil driven by the gear to the fifth bearing hole (50).

2. The transmission housing according to claim 1, wherein the first oil passage includes a first branch passage (61), the first branch passage (61) passing between the first bearing hole (10) and the third bearing hole (30), the first branch passage (61) being configured to be able to guide the oil to the first bearing hole (10) and the third bearing hole (30), respectively.

3. The gearbox housing according to claim 2, characterized in that the first branch (61) comprises a first oil blocking rib (611), the first oil blocking rib (611) being arranged at the third bearing hole (30), the first oil blocking rib (611) being configured to block a portion of the oil and to direct the flow to the third bearing hole (30).

4. The gearbox housing according to claim 2, characterised in that the first branch (61) passes between the first bearing hole (10) and the third bearing hole (30) and extends to the second bearing hole (20), the first branch (61) being configured to be able to lead the oil to the second bearing hole (20) under the influence of the ring gear and the drive motor output shaft.

5. The transmission housing according to claim 4, wherein the first branch (61) comprises a second oil blocking rib (612), the second oil blocking rib (612) being disposed at the second bearing hole (20), the second oil blocking rib (612) being configured to block the oil and guide the oil to flow to the second bearing hole (20).

6. The gearbox housing according to claim 1, wherein the first oil passage comprises a second branch (62), the second branch (62) passing between the third bearing hole (30) and an edge of the body (60) and extending to the second bearing hole (20), the second branch (62) being configured to be able to direct the oil to the second bearing hole (20) and the third bearing hole (30), respectively.

7. The transmission housing according to claim 1, wherein the second oil passage includes a third branch passage (63) and a fourth branch passage (64), the third branch passage (63) passing between the fourth bearing hole (40) and a rim of the body (60) and extending to the fifth bearing hole (50), the third branch passage (63) being configured to be able to guide the oil to the fifth bearing hole (50); the fourth branch (64) is arranged between the first bearing hole (10) and the fourth bearing hole (40) and extends to the fifth bearing hole (50), and the fourth branch (64) is configured to guide oil driven by the gear ring to the fourth bearing hole (40) and the fifth bearing hole (50) respectively.

8. A transmission, characterized in that it comprises a transmission housing according to any one of claims 1-7.

9. A vehicle characterized in that it comprises a transmission according to claim 8.

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